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Product Overview
The SN74HC251DBR from Texas Instruments is a high-speed CMOS 8-input multiplexer with 3-state outputs. It selects one of eight binary data inputs and routes it to the output based on the address inputs (A0, A1, A2). The device features an output enable (OE) input that, when high, forces the output into a high-impedance state, allowing multiple outputs to be connected to a common bus. Operating from 2V to 6V, it is ideal for battery-powered and industrial applications.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
2V to 6V |
| Input Voltage Range |
0V to VCC |
| Output Current (IO) |
±5.2 mA |
| Propagation Delay (tpd) |
15 ns (typ) at 5V |
| Operating Temperature |
-40°C to +85°C |
| Package |
16-SSOP |
| Logic Family |
HC |
| Number of Inputs |
8 |
| Output Type |
3-State |
Key Features
- 8-input multiplexer with 3-state outputs
- Wide operating voltage range: 2V to 6V
- High noise immunity: VNIH = VNIL = 28% of VCC
- Low power consumption: ICC = 80 µA (max) at 25°C
- Compatible with TTL outputs
- ESD protection exceeds 2000V per MIL-STD-883
Target Applications
- Data routing in 5G base station control boards
- Signal selection in automotive dashboard displays
- Industrial PLC input modules
- Portable instrumentation
- Bus isolation in microcontroller systems
Global Supply Chain & Wholesale Solutions
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SN74HC251DBR. Our core advantages include:
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產品概述
SN74HC251DBR 是德州儀器推出的高速 CMOS 8 輸入多路復用器,具有三態輸出。它根據地址輸入(A0、A1、A2)選擇八個二進制數據輸入之一,並將其路由到輸出。器件具有輸出使能(OE)輸入,當 OE 為高電平時,輸出進入高阻抗狀態,允許多個輸出連接到公共總線。工作電壓範圍為 2V 至 6V,適用於電池供電和工業應用。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 (VCC) |
2V 至 6V |
| 輸入電壓範圍 |
0V 至 VCC |
| 輸出電流 (IO) |
±5.2 mA |
| 傳播延遲 (tpd) |
15 ns (典型值) 在 5V |
| 工作溫度 |
-40°C 至 +85°C |
| 封裝 |
16-SSOP |
| 邏輯系列 |
HC |
| 輸入數量 |
8 |
| 輸出類型 |
三態 |
核心特性
- 8 輸入多路復用器,帶三態輸出
- 寬工作電壓範圍:2V 至 6V
- 高抗噪能力:VNIH = VNIL = 28% VCC
- 低功耗:ICC = 80 µA (最大值) 在 25°C
- 與 TTL 輸出兼容
- ESD 保護超過 2000V(MIL-STD-883)
典型應用場景
- 5G 基站控制板中的數據路由
- 汽車儀表盤顯示中的信號選擇
- 工業 PLC 輸入模塊
- 便攜式儀器
- 微控制器系統中的總線隔離
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